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Mineral Resources On-Line Spatial Data

Interactive maps > Data download > Radiometric ages of rocks from Alaska

Alphabetical index of database fields

(Analytic result)

A

Age estimate of the sample in millions of years (Analytic result)

F

Field for free text. (Processing information)

I

Isotopic dating method (Processing information)

L

Latitude in decimal degrees (Geographic location)
Longitude in decimal degrees, west longitude negative (Geographic location)

M

Mineral or phase dated from sample; or denotes that date is calculated from an isochron. (Sample characteristics)

N

Name of 1:250,000 scale quadrangle (Geographic location)

R

Reference of data sample. (Processing information)
Rock name or type (Sample characteristics)

S

Sample ID from published source. If none was given in the cited source, then a sample id was created for this database. (Sample identification)

U

Unique record identifier (Sample identification)

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Page Last modified: 11:56 on 18-Oct-2007